/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
 */

package org.apache.jmeter.gui;

import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.BorderFactory;
import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JPanel;
import javax.swing.JPopupMenu;
import javax.swing.JScrollPane;
import javax.swing.JSplitPane;
import javax.swing.JTree;
import javax.swing.MenuElement;
import javax.swing.SwingUtilities;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.tree.TreeCellRenderer;
import javax.swing.tree.TreeModel;

import org.apache.jmeter.engine.event.LoopIterationEvent;
import org.apache.jmeter.gui.util.ReportMenuBar;
import org.apache.jmeter.report.gui.action.ReportActionRouter;
import org.apache.jmeter.report.gui.tree.ReportCellRenderer;
import org.apache.jmeter.report.gui.tree.ReportTreeListener;
import org.apache.jmeter.samplers.Remoteable;
import org.apache.jmeter.testelement.TestListener;
import org.apache.jmeter.util.JMeterUtils;
import org.apache.jorphan.gui.ComponentUtil;
import org.apache.jorphan.logging.LoggingManager;
import org.apache.log.Logger;

/**
 * ReportMainFrame is based on MainFrame. it uses the same basic structure,
 * but with changes for the report gui.
 * 
 */
public class ReportMainFrame extends JFrame implements TestListener, Remoteable {

    private static final Logger log = LoggingManager.getLoggerForClass();
    
    // The default title for the Menu bar
	private static final String DEFAULT_TITLE = 
    	"Apache JMeter ("+JMeterUtils.getJMeterVersion()+")"; // $NON-NLS-1$ $NON-NLS-2$

    /** The menu bar. */
    protected ReportMenuBar menuBar;

    /** The main panel where components display their GUIs. */
    protected JScrollPane mainPanel;

    /** The panel where the test tree is shown. */
    protected JScrollPane treePanel;

    /** The test tree. */
    protected JTree tree;

    /** An image which is displayed when a test is running. */
	//private ImageIcon runningIcon = JMeterUtils.getImage("thread.enabled.gif");

	/** An image which is displayed when a test is not currently running. */
	private ImageIcon stoppedIcon = JMeterUtils.getImage("thread.disabled.gif");// $NON-NLS-1$

    /** The x coordinate of the last location where a component was dragged. */
    private int previousDragXLocation = 0;

    /** The y coordinate of the last location where a component was dragged. */
    private int previousDragYLocation = 0;

    /** The button used to display the running/stopped image. */
	private JButton runningIndicator;

	/** The set of currently running hosts. */
	//private Set hosts = new HashSet();

	/** A message dialog shown while JMeter threads are stopping. */
	private JDialog stoppingMessage;

    public ReportMainFrame(){
        log.warn("Constructor only intended for use in testing"); // $NON-NLS-1$
    }
    /**
	 * Create a new JMeter frame.
	 * 
	 * @param actionHandler
	 *            this parameter is not used
	 * @param treeModel
	 *            the model for the test tree
	 * @param treeListener
	 *            the listener for the test tree
	 */
	public ReportMainFrame(ActionListener actionHandler, TreeModel treeModel,
            ReportTreeListener treeListener) {
        runningIndicator = new JButton(stoppedIcon);
        runningIndicator.setMargin(new Insets(0, 0, 0, 0));
        runningIndicator.setBorder(BorderFactory.createEmptyBorder());

        this.tree = this.makeTree(treeModel,treeListener);

        ReportGuiPackage.getInstance().setMainFrame(this);
        init();

        setDefaultCloseOperation(DO_NOTHING_ON_CLOSE);
	}

	// MenuBar related methods
	// TODO: Do we really need to have all these menubar methods duplicated
	// here? Perhaps we can make the menu bar accessible through GuiPackage?

	/**
	 * Specify whether or not the File|Load menu item should be enabled.
	 * 
	 * @param enabled
	 *            true if the menu item should be enabled, false otherwise
	 */
	public void setFileLoadEnabled(boolean enabled) {
        menuBar.setFileLoadEnabled(enabled);
	}

	/**
	 * Specify whether or not the File|Save menu item should be enabled.
	 * 
	 * @param enabled
	 *            true if the menu item should be enabled, false otherwise
	 */
	public void setFileSaveEnabled(boolean enabled) {
        menuBar.setFileSaveEnabled(enabled);
	}

	/**
	 * Set the menu that should be used for the Edit menu.
	 * 
	 * @param menu
	 *            the new Edit menu
	 */
	public void setEditMenu(JPopupMenu menu) {
        menuBar.setEditMenu(menu);
	}

	/**
	 * Specify whether or not the Edit menu item should be enabled.
	 * 
	 * @param enabled
	 *            true if the menu item should be enabled, false otherwise
	 */
	public void setEditEnabled(boolean enabled) {
		menuBar.setEditEnabled(enabled);
	}

	/**
	 * Set the menu that should be used for the Edit|Add menu.
	 * 
	 * @param menu
	 *            the new Edit|Add menu
	 */
	public void setEditAddMenu(JMenu menu) {
		menuBar.setEditAddMenu(menu);
	}

	/**
	 * Specify whether or not the Edit|Add menu item should be enabled.
	 * 
	 * @param enabled
	 *            true if the menu item should be enabled, false otherwise
	 */
	public void setEditAddEnabled(boolean enabled) {
		menuBar.setEditAddEnabled(enabled);
	}

	/**
	 * Specify whether or not the Edit|Remove menu item should be enabled.
	 * 
	 * @param enabled
	 *            true if the menu item should be enabled, false otherwise
	 */
	public void setEditRemoveEnabled(boolean enabled) {
		menuBar.setEditRemoveEnabled(enabled);
	}

    /**
     * Close the currently selected menu.
     */
    public void closeMenu() {
        if (menuBar.isSelected()) {
            MenuElement[] menuElement = menuBar.getSubElements();
            if (menuElement != null) {
                for (int i = 0; i < menuElement.length; i++) {
                    JMenu menu = (JMenu) menuElement[i];
                    if (menu.isSelected()) {
                        menu.setPopupMenuVisible(false);
                        menu.setSelected(false);
                        break;
                    }
                }
            }
        }
    }
    /**
     * Show a dialog indicating that JMeter threads are stopping on a particular
     * host.
     * 
     * @param host
     *            the host where JMeter threads are stopping
     */
    public void showStoppingMessage(String host) {
        stoppingMessage = new JDialog(this, JMeterUtils.getResString("stopping_test_title"), true);// $NON-NLS-1$
        JLabel stopLabel = new JLabel(JMeterUtils.getResString("stopping_test") + ": " + host);// $NON-NLS-1$
        stopLabel.setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));
        stoppingMessage.getContentPane().add(stopLabel);
        stoppingMessage.pack();
        ComponentUtil.centerComponentInComponent(this, stoppingMessage);
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                if (stoppingMessage != null) {
                    stoppingMessage.show();
                }
            }
        });
    }

    public void setMainPanel(JComponent comp) {
        mainPanel.setViewportView(comp);
    }

	public JTree getTree() {
		return this.tree;
	}

	// TestListener implementation

	/**
	 * Not sure if this should be in the ReportMainFrame, since the
     * report component doesn't really test, it generates reports. for
     * now, I will use it to trigger reporting. Later we can refactor
     * MainFrame and create an abstract base class.
	 */
	public void testStarted() {
        
        // super.testStarted();
	}

	/**
     * Not sure if this should be in the ReportMainFrame, since the
     * report component doesn't really test, it generates reports. for
     * now, I will use it to trigger reporting. Later we can refactor
     * MainFrame and create an abstract base class.
	 */
	public void testStarted(String host) {
        // super.testStarted(host);
	}

	/**
     * Not sure if this should be in the ReportMainFrame, since the
     * report component doesn't really test, it generates reports. for
     * now, I will use it to trigger reporting. Later we can refactor
     * MainFrame and create an abstract base class.
	 */
	public void testEnded() {
        // super.testEnded();
	}

	/**
     * Not sure if this should be in the ReportMainFrame, since the
     * report component doesn't really test, it generates reports. for
     * now, I will use it to trigger reporting. Later we can refactor
     * MainFrame and create an abstract base class.
	 */
	public void testEnded(String host) {
        // super.testEnded(host);
	}

	/* Implements TestListener#testIterationStart(LoopIterationEvent) */
	public void testIterationStart(LoopIterationEvent event) {
	}

	/**
	 * Create the GUI components and layout.
	 */
	private void init() {// called from ctor, so must not be overridable
		menuBar = new ReportMenuBar();
		setJMenuBar(menuBar);

		JPanel all = new JPanel(new BorderLayout());
		all.add(createToolBar(), BorderLayout.NORTH);

		JSplitPane treeAndMain = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT);

		treePanel = createTreePanel();
		treeAndMain.setLeftComponent(treePanel);

		mainPanel = createMainPanel();
		treeAndMain.setRightComponent(mainPanel);

		treeAndMain.setResizeWeight(.2);
		treeAndMain.setContinuousLayout(true);
		all.add(treeAndMain, BorderLayout.CENTER);

		getContentPane().add(all);

		tree.setSelectionRow(1);
		addWindowListener(new WindowHappenings());

		setTitle(DEFAULT_TITLE);
		setIconImage(JMeterUtils.getImage("jmeter.jpg").getImage());// $NON-NLS-1$
    }

	public void setExtendedFrameTitle(String fname) {
		// file New operation may set to null, so just return app name
		if (fname == null) {
			setTitle(DEFAULT_TITLE);
			return;
		}

		// allow for windows / chars in filename
		String temp = fname.replace('\\', '/'); // $NON-NLS-1$ // $NON-NLS-2$
		String simpleName = temp.substring(temp.lastIndexOf("/") + 1);// $NON-NLS-1$
		setTitle(simpleName + " (" + fname + ") - " + DEFAULT_TITLE); // $NON-NLS-1$ // $NON-NLS-2$
	}

	/**
     * Create the JMeter tool bar pane containing the running indicator.
     * 
     * @return a panel containing the running indicator
     */
    protected Component createToolBar() {
        Box toolPanel = new Box(BoxLayout.X_AXIS);
        toolPanel.add(Box.createRigidArea(new Dimension(10, 15)));
        toolPanel.add(Box.createGlue());
        toolPanel.add(runningIndicator);
        return toolPanel;
    }

    /**
     * Create the panel where the GUI representation of the test tree is
     * displayed. The tree should already be created before calling this method.
     * 
     * @return a scroll pane containing the test tree GUI
     */
    protected JScrollPane createTreePanel() {
        JScrollPane treeP = new JScrollPane(tree);
        treeP.setMinimumSize(new Dimension(100, 0));
        return treeP;
    }

    /**
     * Create the main panel where components can display their GUIs.
     * 
     * @return the main scroll pane
     */
    protected JScrollPane createMainPanel() {
        return new JScrollPane();
    }

    /**
	 * Create and initialize the GUI representation of the test tree.
	 * 
	 * @param treeModel
	 *            the test tree model
	 * @param treeListener
	 *            the test tree listener
	 * 
	 * @return the initialized test tree GUI
	 */
	private JTree makeTree(TreeModel treeModel, ReportTreeListener treeListener) {
		JTree treevar = new JTree(treeModel);
		treevar.setCellRenderer(getCellRenderer());
		treevar.setRootVisible(false);
		treevar.setShowsRootHandles(true);

		treeListener.setJTree(treevar);
		treevar.addTreeSelectionListener(treeListener);
		treevar.addMouseListener(treeListener);
		treevar.addMouseMotionListener(treeListener);
		treevar.addKeyListener(treeListener);

		return treevar;
	}

    /**
     * Create the tree cell renderer used to draw the nodes in the test tree.
     * 
     * @return a renderer to draw the test tree nodes
     */
    protected TreeCellRenderer getCellRenderer() {
        DefaultTreeCellRenderer rend = new ReportCellRenderer();
        rend.setFont(new Font("Dialog", Font.PLAIN, 11));
        return rend;
    }

    public void drawDraggedComponent(Component dragIcon, int x, int y) {
        Dimension size = dragIcon.getPreferredSize();
        treePanel.paintImmediately(previousDragXLocation, previousDragYLocation, size.width, size.height);
        this.getLayeredPane().setLayer(dragIcon, 400);
        SwingUtilities.paintComponent(treePanel.getGraphics(), dragIcon, treePanel, x, y, size.width, size.height);
        previousDragXLocation = x;
        previousDragYLocation = y;
    }
    
    /**
     * A window adapter used to detect when the main JMeter frame is being
     * closed.
     */
    protected static class WindowHappenings extends WindowAdapter {
        /**
         * Called when the main JMeter frame is being closed. Sends a
         * notification so that JMeter can react appropriately.
         * 
         * @param event
         *            the WindowEvent to handle
         */
        public void windowClosing(WindowEvent event) {
            ReportActionRouter.getInstance().actionPerformed(new ActionEvent(this, event.getID(), "exit"));
        }
    }
}
